| 侯长才,李宏录,李永太.青海百吨沟地区金矿地质特征及找矿前景[J].矿产勘查,2015,6(2):142-148 |
| 青海百吨沟地区金矿地质特征及找矿前景 |
| Geological characteristics and prospecting potential of the Baidungou gold mineralization area in Qinghai |
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| DOI： |
| 中文关键词: 金矿 地质特征 含矿破碎蚀变带 找矿前景 青海 百吨沟地区 |
| 英文关键词: gold deposit, geological characteristic, ore-bearing structrual alteration belt, prospecting potential, Baidungou area, Qinghai |
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| 摘要点击次数: 2117 |
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| 中文摘要: |
| 研究区内广布的富金元古宇地层是金矿集中区形成的基础,多期次的强烈岩浆活动为金矿集中区的形成提供了极为丰富的成矿流体和矿质来源,三大脆韧性剪切带为矿液流通和汇聚提供了有利空间。在区内的三大脆韧性剪切带中分布有Ⅱ、Ⅳ、Ⅶ、Ⅸ、Ⅺ和Ⅻ号含矿破碎蚀变带,带内发育褐铁矿化、黄钾铁矾化、硅化、碳酸盐化、高岭土化和绢云母化蚀变,金矿化主要与褐铁矿化、黄铁矿化关系密切,特别是褐铁矿化与绿泥石化、绢云母化伴生时,细粒黄铁矿化与绢云母化伴生时,则金矿化更好。目前已提交资源量6.97 t。综合分析该区地质矿化特征和控矿因素认为,研究区成矿条件优越,找矿潜力巨大,推测百吨沟地区金矿远景资源量可达大型金矿床规模。 |
| 英文摘要: |
| The widely distributed Proterozoic strata with high gold background concentration in the Baidungou area plays a basic role in the formation of the gold deposit in the gold mineralization-concentrated area. Multiple stages of magmatic activities provide rich ore-forming fluid and ore-forming materials. The three brittle-ductile shear zones act as passageway for ore-forming fluid as well as places for deposition of ore-forming elements. Six ore-bearing fractured alteration belts ( Ⅱ, Ⅳ, Ⅶ, Ⅸ, Ⅺ and Ⅻ ) are outlined in the three brittle ductile shear zones. Alteration includes limonitization, jarositization, silicification, carbonatization, kaolinitization, and sericitization, and the gold mineralization is closely related to limonization and pyritization, especially the intensive gold mineralization when limonization is associated with chloritization and sericitization, and the fine pyrite associated with sericitization. Based on the integrated analysis of geological characteristics and ore-controlling factors, it is concluded that the ore-forming geological conditions are very favorable for gold mineralization in the study area, and there is great prospecting potential for finding the large-sized gold deposit in the area. |
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